利用N 4-芳基,N 4-(Boc)胞嘧啶中间体的还原性Ni-介导的环化反应,开发了本质上荧光胞嘧啶类似物5,6-benzopC的合成。发现5,6-BenzopC具有有趣的荧光性质(Φ= 0.79,EtOH;斯托克位移113 nm)。进行了5,6-benzopC单体的肽核酸(PNA)寡聚化,然后与互补的脱氧核糖核酸(DNA)和核糖核酸(RNA)进行了杂交研究,结果表明该修饰在所考察的序列环境中具有良好的耐受性。最初尝试合成存在于5,6-苯并pC中的杂环骨架导致发现了通往嘧啶并[1,6- a ]苯并咪唑,嘧啶并[ 1,6- a ]喹唑啉和嘧啶并[1,6-]的途径。a ]苯并[ b ] 6-硼-1,3-二嗪杂环骨架。
but are restricted to a nucleic acid output. Templated reactions enable the translation of a nucleic acid cues into diverse small molecule outputs but are more limited in their amplification. Herein, we demonstrate the coupling of a DNA circuit to templated reactions in order to achieve high levels of amplification in the output of small molecules, in response to a nucleic acid input. We demonstrate
基于 DNA 的电路支持逻辑门控操作和放大,但仅限于核酸输出。模板化反应能够将核酸线索翻译成不同的小分子输出,但其扩增受到更多限制。在此,我们展示了 DNA 回路与模板化反应的耦合,以响应核酸输入,在小分子的输出中实现高水平的扩增。我们证明 DNA 电路与模板反应的耦合允许检测分析物的 fM 浓度,并且可以响应细胞毒性药物的释放。
Binding Affinities of Oligonucleotides and PNAs Containing Phenoxazine and G-Clamp Cytosine Analogues Are Unusually Sequence-Dependent
temperatures of DNAduplexescontaining the phenoxazine (P) and G-clamp (X) cytosine analogues exhibited a strong and unusual dependence on the nucleoside flanking the modified nucleobase, and the same trend was observed in PNA-DNA duplexes incorporating X in the PNA chain. Molecular dynamics simulations of the DNAduplexes show that generalized stacking (including secondary interactions of the ammonium
[GRAPHICS]Syntheses of the protected amino- and guanidino-G-clamp PNA monomers, 9a and 9b, respectively, have been accomplished in eight steps from 5-bromouracil. Enhanced stacking interactions and additional hydrogen bonds with guanine should increase the affinity of PNAs incorporating these cytosine analogues for their complementary strands.
[EN] PHENOXAZINE DERIVATIVE AND DRUG DELIVERY SYSTEM FORMULATION USING SAME<br/>[FR] DÉRIVÉ DE PHÉNOXAZINE ET FORMULATION DE SYSTÈME D'ADMINISTRATION DE MÉDICAMENT L'UTILISANT<br/>[JA] フェノキサジン誘導体およびそれを用いたドラッグデリバリーシステム製剤
During our search for novel CGRP antagonists, we had great difficulty in accessing one of our key motifs. Herein, we communicate how we solved the problem by an unprecedented Mitsunobu alkylation using unprotected amino alcohols.